Diethyl squarate
Synonym(s):Diethyl squarate;Squaric acid diethyl ester
- CAS NO.：5231-87-8
- Empirical Formula: C8H10O4
- Molecular Weight: 170.16
- MDL number: MFCD00001333
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-04-27 16:27:43
What is Diethyl squarate?
Chemical properties
clear yellow to light brownish liquid
The Uses of Diethyl squarate
Diethyl squarate is an intermediate for pharma products, for photochemicals used in the dry-view process, in synthesis of photosensitive squaraine dyes (eg. laser dyes used in CD-Rom) and as intermediate for functional polymers.
The Uses of Diethyl squarate
3,4-Dethoxy-3-cyclobutene-1,2-dione is used as a starting material for synthesis of furanones and quinones. It undergoes ethoxy substitution with amines and unsaturated organosilanes.
General Description
The reaction of 3,4-diethoxy-3-cyclobutene-1,2-dione (squaric acid diethyl ester) with glycosylamines (formed by reducing oligosaccharides) was studied. The derivatives formed were linked to amino-functionalized lipids, solids or proteins.
Properties of Diethyl squarate
| Melting point: | 13-18 °C |
| Boiling point: | 95 °C0.1 mm Hg(lit.) |
| Density | 1.15 g/mL at 25 °C(lit.) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | 2-8°C |
| form | Liquid |
| color | Clear yellow to light brownish |
| Water Solubility | insoluble |
| BRN | 640626 |
| CAS DataBase Reference | 5231-87-8(CAS DataBase Reference) |
| NIST Chemistry Reference | 3,4-Diethoxy-3-cyclobutene-1,2-dione(5231-87-8) |
Safety information for Diethyl squarate
| Signal word | Danger |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H317:Sensitisation, Skin H319:Serious eye damage/eye irritation H334:Sensitisation, respiratory H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Diethyl squarate
| InChIKey | DFSFLZCLKYZYRD-UHFFFAOYSA-N |
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